Brake head and shoe.



G. H. WILLIAMS, JR. BRAKE HEAD AND SHOE.

APPLICATION FILED JUNE 3, 1909.

952,553 Patented Mar. 22, 1910.

ANDREW a GRAHAM 60., PHDTD-LITNQGRAPHERS, WASHINGTON. 01

UNITED gTATE PATENT CHARLES H. WILLIAMS, JR., OF CHICAGO, ILLINOIS,ASSIGNOR TO CHICAGO RAILWAY EQUIPMENT COMPANY, OF CHICAGO, ILLINOIS, ACORPORATION.

BRAKE HEAD AND SHOE.

To all whom it may concern:

Be it known that I, CHARLES H. WVILLIAMs, J12, a citizen of the UnitedStates, residing at Chicago, Illinois, have invented a certain new anduseful Improvement in Brake Heads and Shoes, of which the following is afull, clear, and exact description, such as will enable others skilledin the art to which it appertains to make and use the same, referencebeing had to the accompanying drawings, forming part of thisspecification, in which Figure 1 is a side elevational view of myimproved brake head. Fig. 2 is a front elevational view of the head.

This invention relates to a new and useful improvement in brake headsand shoes, the object being to overcome the faults of the Christie headwith respect to the fit between the head and the shoe.

I11 my present device, there is no shoe key to back out and fall, asheretofore, and, furthermore, in my present construction, the shoecannot twist sidewise, as is possible in the Christie type.

In the accompanying drawings, I have shown a brake head and shoe, inwhich the parts are secured together by a tapered clovetail interlock,which tends to bind the shoe tightly to its seat and dispenses with thevarious lugs and fittings necessary in the Christie type of head.Furthermore, by my improved construction, it is possible to remove thebrake shoe longitudinally of the beam, or in a direction parallel to theaxis of the beam which is of some importance in inserting new shoes incertain types of trucks. By dispensing with interlocking lugs betweenthe head and shoe, as in the Christie type, I avoid all danger of thelugs on the head becoming worn away in the event that the shoe isunevenly worn.

In the drawings, 1 indicates the brake head, which may be mounted uponany kind of beam. This brake head is provided with the usual hangeropenings 2 and 3. The shoe seat, constituting the front face of thehead, is devoid of locking lugs and key re- Specification of LettersPatent.

Application filed June 3, 1909.

Patented Mar. 22, 1910. Serial No. 499,914.

cesses, as in the Christie type of head, said shoe seat being preferablyplain, as shown in Fig. 2. There is, however, a longitudinally disposed,tapered recess 4 which may communicate with the hanger opening 3, saidrecess having overhanging, interlocking portions 4 to cooperate with thetapered, dovetailed key 5 of the brake shoe 6. This wedge-shaped key 5on the back of the brake shoe may slip longitudinally into the recess 4,the flat shoe seat permitting such movement, and when in position acotter pin 7 is passed through openings in lugs or ears 8 extending fromthe brake head, said cotter pin being located behind the wedge key 5 toprevent the displacement of the brake shoe. If desired, ribs 6 may beadded to the back of the shoe at its ends to reinforce the overhangingends of the shoe; or, if desired, the shoe seat on the brake head can beextended to provide a more extensive bearing surface and backing supportfor the shoe.

From the above, it will be seen that the objections, incident to the useof the Christie head heretofore pointed out, are obviated by my improvedconstruction.

I am aware that minor changes in the construction, combination andarrangement of the several parts of my improvement can be made andsubstituted for those herein shown and described without in the leastdeparting from the nature and principle of my invention.

Having thus described my invention, what I claim is:

The combination with a brake head having a dove-tail recess in its face,and a brakehanger recess communicating therewith, and

a brake-shoe having an interlocking rib fit-

